Device for maintaining the width of sheets of glass being drawn.



' 6 SHEETS-SHEET 1.

Patented Nov.23,1 909.

I. W. GOLBURN.

APPLICATION FILED umzm lsog.

DEVIGE FOB MAINTAIHING THE WIDTH 0F SHEETS 0P GLASS BBINQDBAWN.

N W A R D G N I E B S S A L G F 0 S m N B H US BF L0 m .0 .D II W W m T G N I N I A T N I A M R O F 0 5 0 w? m6 APPLICATION FILED JAN.27 1908.

' Patented "Nov. 23. 1909.

8 SHEET8-SHEET 2.

\NVENTOR BY ms ATTORNEYS. v ZILM I "Mam;

I. W. OOLBURN. DEVICE FOR MAINTAINING THE WIDTH OF SHEETS 0F GLASS BEING DRAWN. APPLICATION FILED JAN.2T. 190s.

- 940,675; Patented N0v.23,1909.

sBEBTs-sHBBT 3.

wrmtsszs J k I. W. GOLBURN. DEVIGE FGR MAINTAINING TEE WIDTH 0F SEEETS 0F GLASS BEING 333;;

APPLICATION FILED JAE. 21'. 1908 -smm* 4.

6 SHEETS HIIIC 526m 2.

J 1 invenmr k i Attorney/6 I w y I. W. GOLBURN. DEVICE FOR MAINTAINING THE WIDTH 0F SHEETS 0F GLASS BBINGDRAWN.

APPLICATION rum) mLzv. 1908.

940,675. Patented Nov. 23. 1909.

6 SHEETS SEEBT 5p FTGJL Inventor %@A 4W/ I v BY g gjwjzm g,

v I. W. GOLBURN. DEVICE FOR MAINTAINING THE WIDTH 0F SHEETS 0F GLASS BEING DRAWN.

v APPLICATION FILED 3111.27. 1908. 940,675. Patented Nov. 23. 1909.

e sums-sum a.

of Sheets of Glass ency of the sheet during the drawing opera-v IEVXHG COLBURN, OF FRANKLIN, PENNSYLVANIA,.ASSIGNQR T0 COLBURN MA- CHIHE GLASS GDMPANY, JERSEY.

0F FRANKLIN, PENNSYLVANIA, A CORPQRATION 0F NEVI I DEVICE tron. gamrain'nes THE WIDTH or SHEETS or GLASS snms'nanwn.

Specification of Letters Patent.

Patented Nov. 23, 1909.

Application filed January 2'7, 1908. Serial No. 412,59s.

it all whom it may concern):

Be it known that I, IRVING W. CoLBURN,

of l? ranlilin, Venango county, Pennsylvania,

have invented a new and useful Improve Maintaining the \Vldth ment in Devices for Being Drawn, which in: vention is fully set forth in the following specification.

This invention relates to the art of drawing sheet glass. In this art it is a wellknown fact that when attempts are made to draw glass in sheet form directly from a molten mass the sheet has a tendency to narrow down to a string or thread as the bait recedes from the molten mass, and it is the object'of the present invention'to provide means whereby the width of said sheet may be automatically maintained substantially uniform.

l n my United StatesPatent No. 836,439,

dated November 20th, 1906, I have shown a machine for drawing sheet glass provided with one kind of means for overcoming the narrowing patent and. application constitute etlicient,

means for overcoming the narrowing tend- I llUl'L;

seized and held between them for a short space during its upward slightly stretched laterally, fin ers travel, apd also after which said automatically release their ho ld,

tendency of the sheet being drawn, and in my pendlng United States,

invention is designed to atdrawing operas shown and eh'ronously with the drawing mechanism proper, This "drawing mechanism may be of any suitable construction for drawing the glass in sheet form, and 18 preferably that described in my Letters Patent and application aforesaid.

The inventive idea involved is capable of ex iression m a variet ot mechanical strucl t-ures, one oi which, for the purpose of illustration, is shown in the accompanying drawwith the X portions shown in section.

ings in connection with a glass machine of the general character shown and described in my said patent and application, but it is to be understood that the drawings are for the purpose of illustration only, and are not.

intended to limit the invention to the particular form of apparatus shown, nor to use particular character of machine shown.

In said drawings-Figure l is a plan view of my gripping and side-holding lingers, and the elements operating therewith. Fig. 2 is a side elevation of Fig. 1. section on the line Ill-III, Fig. 1, looking to. the left. arms of the gripping fingers ren'ioved, the rear endof the swinging lever being broken away. Fig. 5 shows one of the arms with portions broken away and other portions in section. Fig. 5* is aperspectivedetail shownig a fragment of one of the arms with the trunnion sleeve mounted thereon; and Fig.

6 is a section on the line VII-VI, Fig. t,

looking to the right. Fig. 7 is an enlargedplan view with portions broken away for the purpose of exposing other parts to View. Fig. 81s an enlarged side elevation with spective view v is, a diagrannnatic plan View of two 0 width maintainino inatheir proper rlative positions, together Fig. i is a plan view with the Fig. 3 is a Fig. 9' is a per- Q of the swinging lever. Fi l0 ioo devices, showing them.

with the variable speed transmission through which they and the related drawing mechanism are driven. Fig. 11 is a vertical section on the line XI'XI, Fig. 12; and Fig. 12 is a central longitudinal vertical section of the working chamber at the end of my continuous glass drawing machine, showing my widthmaintain ing device applied thereto.

cured thereto and having two oppositely disposed horizontally extending trunnions 4, 4. The end of each arm opposite the fingers 2 is provided with a suitable fitting, preferably in the form of a T 5. In the outer end i of said T 5 there is introduced a pipe or tube .provided therefor in upwardly extending 6 of less diameter than the inner diameter of the tubular arm 1, said pipe or tube 6 extending into proximity with the end of finger 2. Attached to a branch of the T 5 is "an escape pipe 7, the entire structure being such that water or other cooling fluid may pass inward through'the pipe 6 to the, fingers 2, and outward between the pipe 6 and the walls of the tubular arm 1, escaping through the pipe 7.

, Each of the tubular arms 1 has secured thereto in any suitable manner, as by a sleeve surrounding the arm, a vertically extending stud 8. The trunnions {1, 4, restin suitable trunnion bearings 9, 9, see Fig. 9,

brackets 10, 10, carried on a horizontally swinging arm 20. Projecting downward from the arm 20 beneath the brackets 10 is a stud l1 turning in a bearing in a carriage 12 (see Fig. 8), the construction being such that. the movements of the swinging-arm 2O impart a horizontal oscillatory movement to thetrunnion bearings 9, 9. The carriage 12 is slidably mounted upon a guide 13, Fig. 8, which is rigidly fixed to the base 14. For

the purpose of imparting a sliding or to and fro movement to the carriage 12 there is mounted at one side of the base 14- a hori- .-zontally revoluble crank 15 (see Fig. 7) having a crank pin 18 entering a slot 19 in lever 17,"fulcrumed at 16 on the opposite side of the basefrom the crank 15, the construction being such that the revolutions of the crank 15 will cause the lever 17 to oscillate on its fulcrumjinlhe manner indicated in dotted lines, Fig. 7. The lever 17 is connected to ing lever 20 extends rearwardly across and.

rests upon the base 14, and each of said levers has at its'i'earward end an outwardly extending arni' 521, Fig. 9, terminating in a vertical eye-piece 21. Between the eyepieces 21 on the two levers 20 (see Fig. 7)

extends a rod 23 which passes looselv through the eye-pieces and has a nut or bolt onits exterior end, said rod being also sup ported by eye-piece .25 on a bracket 24 extending rearwardly' from the base. Surrounding the rod 23 and reacting between the eye-pieces 21 and 25 on either side of said eye-pieces is a spring 22.

The opening movement of fingers 2, 2, is

effected by causing the outer ends of levers 20 bearing the eye-pieces 21, to swing inward or toward each other. For the purpose of accomplishing this function, there is rigidly attached to base 14 two plates 26, 26, which project over the levers 20 (see Fig. 7), and said levers are provided with up wardly projecting pins 27 'lying normal y in a cut-away portlon of each plate 26, which portion extends rearward and is of such form that, for a larger portion of the rearward movement, the walls of the cut-away portion do not act upon the pins 27. At the outer fportion of said plates, and nearthe end 0 the outward travel of the pins 26, when the levers 20 are actuated by the swinging lever 17, said plates are provided with inwardly inclined cam surfaces 28 upon which the plus 26 impinge, thereby forcing said pins, and with them the levers 20, inwardly or toward each other. This move ment is efiected against the tension of springs 22, and causes the oscillation of the trunnion bearings 9, 9, thereby effecting the opening movement of the fingers 2, 2. V hen the ends ofthe swinging levers 20 are in the position to effect this opening movement a latch 29 (see Figs. 6 and 7) which is pivoted to one of the arms 20, catches over the other arm 20! and thus retains the fingers in open position. The outer or free end of said latch 29 projects beyond the arm 20 and when in latched position projects also downward so that. a part thereof, as the carriage moves forward, impinges upon the upwardly inclined face of a releasing cam 30, Fig. 7, which lifts the latch, thereby causing it to release the levers 20, when the s 'iri ngs 22 swing said levers apart, thereby causing the fingers '2, 2, to close or asume a gripping position.

' speed and also determines the -tical movement of the fingers 2. '2,

For the purpose of imparting the vertically oscillating movement to fingers 2, 2, counter-weights 31, 31 are placed 'upon the arms 1, 1, intermediatethe trunuions and thegrip-lingers; These co'imtcr-weights act to overoalance the outer ends of the arms 1, 1, and depress the gripping fingers 2,2.--

Referring to Figs?) and 8. 33 1S :1 plate adjustably mounted upon the bearing 32 of the crank shaft. This plateisabove the arms 1, 1. and is inclined downward and-f 1Asthe sheet of away from the' gripping fingers 2. 2, with its lower inclined face, inthe line of travel of the before-mentioned studs 8 8, carried rearward,

said arms. As the armstravel under side the studs 8, S, impinge upon the of theinclined plate, thereby causing the] arms to swing-downward,and as said arms travel forward, that is toward the sheet/ht glass being drawn, thepinsfi, 8, rise, this"v being permitted by the inclined face of plate 33, the counter-weights acting to'niove the fingers downwardly. The angle of inclination of said plate in part determines the extent of ver-- and by adjusting said plate at the propel-angle, the fingers may be caused to operate with the related drawingmechanism in efiect-ing' the upward. travel of the sheet of glass; If desired',-the lingers could also be caused to lag somewhat with relation to theupward travel of said sheet.

Ishcet glass.

'- Jis "hus described, my improved Width.-

inaintaining device may be applied tovany -snitablen1acl1ine for continuous drawing of Preferably, however, itis apv *plied to my improved continuous sheet glass drawing machine shown and described in my patent and application aforesaid. When so applied, the base 14 is adjustably 'mounted on av suitable bracket or support 34, Fig. 11, one of which is located on each, side of the working tween the skinuning rolls 36, see Fig. 12, in

lateral alincment with the upwardly movmg sheet of glass 37, and somewhat above the surface of the molten-glass in said work ing chamber, The purpose and operation of said skimming rolls 3() are fully set forth in my said Letters-Patent #836, l39, and need not be herein specifically described. Motion is imparted to the crank 15 by means of shaft to which power is transmitted through the variable speed pulley 39, which in turn receives its power from a jack-shaft 40, which is pulley 41, which latter shalt receives movement from any suitable power device, suoli for example as an electric-motor 42. Itis to be particularly noted that by the system of power transmission shove set forth I. am

enabled to regulate the speed or operation of each width-controllingor maintaining device independent of the other by means of the variable change-speed pulleys 39, one of which is provided for each of the shafts 38 on the opposite sides of the machine, see Fig. 10. Furthermore, the speed of opera.- tion of the machine as a whole may he regulated by means of the variable speed puleyll.

The operation of my device is as follows: glass is drawn upward in the manner and by the mechanism fully and clearly set forth edges of the sheet are intermittently seized by the'fingers 2,2, which retain their hold chamber 85 of the machine;

also driven by avariable speed on said edges for a short interval of the upward movement of said sheet and auto 1-n'1 atically move upward therewith, and, if I desired, even at a slightly greater speed, for the purpose of assisting the drawing mechanism and causing the upward movement of the sheet of move outward, thus exerting c stretching action upon the sheet; they then automaticallyvrelease their hold, recede or move outward, downward and inward to again seize the edges of the sheetof glass, this operation being automatically continued throughout the drawing'of the sheet. The intervals of the seizures aforesaid may be varied as circumstances-and conditions require by means of the variable speed pulleys 39, and the seizures uponieither edge of the may require.

In F lg. 11 the impressions 43 of the gripping fingers 2, 2, upon each edge of the sheet are clearly shown. I

For the purpose of delivering water or other cooling 2, 2, and conveying the same therethrough, there is attached to the outer end oftube {i and to branch 7, a flexible inlet connection ME and a like outlet connection 45, said inlet connection leading from any suitable source of cooling fluid, and outlet conuectionno leading'to at sewer or other desirable place of discharge.

Some of the reference numerals in Fig. 12 are those for corresponding parts in my aforesaid application, many reference numorals of. said applicatiom.however, which would be duplicates of those herein used, being omitted in the drawings to avoid confusion.

What is claimed is: i 1. In sheet glass drawing apparatus, the combination of means for drawing a sheet of glass, with automatic width msintaining means intermittentlyv seizing the edges of the sheet during the'drawing operation.

2. In sheet glass'drawingapparatus,the

glass; said fingers also.

fluid to arms 1, l, and fingers I sheet may be isoc'hronal, or otherwise, as'circumstances the edges of the sheet during thedrawing ope 'ation.

3. 111 sheet glass drawing ap'3aratus,-the

combination of means for drawing a sheet of glass, with automatic sheet stretching means intermittently seizing the edges of the sheet during the drawing operation.

4. In sheet glass drawing apparatus, the

' combination of means for drawing a sheet of glass, with automatic sheetrstretching means intermittent-1y seizing and releasing the edges of the sheet during the drawing operationi 5. In sheet glass drawing apparatus, the

combination of means for drawing a sheet of glass; with automatic width-maintaining and sheet-stretching means intermittently seizing and releasing the edges of the sheet during the drawing operation.

6. 111 sheet glass drawing apparatus, the combination of means for drawing a sheet of glass, with automatic widtl1 -maintaini11g means seizing the sheet at measured intervals, and means for varying said infiervals. 7. In sheet glass drawing appara us, the

combination of means for drawing a sheet of glass, with automatic width-maintaining and sheet-stretching means seizing the sheet at measured intervals, and means for varying said intervals.

8. In sheet glass drawing apparatus, the combination of means for drawing a sheet of glass, with automatic width-maintaining means seizing the'edges of the sheet at stated intervals during the drawing operation. devices imparting movement to said means during said seizures, and adjustablepower mechanism controlling the rate of said movement.

9. In sheet glass drawing appa atus, the combination of means for drawing a sheet of glass, with a plurality of sets of auto matic means intermittently seizing the op-' posite edges of the sheetduring the drawing operation to maintain the width of the sheet, and devices independently timing the duration of the seizures by each of said sets of means.

10. In sheet glass drawing apparatus, the combination of means for drawing a sheet of glass, with a plurality of sets of automatic means one set located approximate to each edge of the sheet and intermittently seizing said edges at stated intervals during the drawing operation, and independently controlled means for applying power to each of said sets, whereby their action maybe caused to be isochronal or otherwise as desired. I

11. In sheet glass drawing apparatus, the

' ation, whereby said width-maintaining means ati'ng said drawing combination of mechanism for drawing a sheet of glass, with automatic means inter 55 mittently seizing the edges of the sheet at predetermined intervals during the drawing operation, means regulating the length or duration of said intervals, and means controlling the rates of movement of said drawing mechanism and said seizing means, whereby the said movements may be synchronized.

12. In sheet glass drawing apparatus, the combination of mechanism for drawing a sheet of glass, a plurality of sets of automatically operated fingers seizing each edge of the sheet durin 'the drawing operation, means automatically actuating said fingers in the direction of movement of said sheet for a predetermined interval, means automatically moving each set of fingers outward whereby a stretching action is exerted on the edges of the sheet, and automatic releasing means actuating said fingers to release them atthe end of each of said intervals, and means moving said fingers downward. M V l 13. In sheet glass drawingapparatus, the combination of mechanism for drawin a sheet of glass, with width-maintaining fingers automatically seizing the edges of the sheet during the drawing operation, and automatic cooling devices cooperating with said fingers to cool the same.

l l. In sheet glass drawing apparatus, the combination of mechanism for drawing a sheet of glass, with automatic width maintaining means seizing the edges of the sheet and cooperating with the said drawing mechanism in the upward or drawing movement of the sheet.

15. In sheet glass drawing apparatus, the combination of mechanism for drawing a sheetof glass, with automatic width-main t-aining means intermittently seizing the edges of the sheet during the drawing open tion, and mechanism moving said means upward and outward during the drawing opercooperate with the drawing mechanism inv etl'e'cting the upward movement or drawing of said sheet.

' 1(3. Inasheet-glass drawing apparatus,1the combination of sheet-drawing means, with width-maintaining means seizing the edges of'the sheet, and means simultaneously opermeans and said widthmaintaining means;

17. vsheet-glass drawing apparatus, the combination of sheet-drawing means, with width-mainta ining means intermittently seizing and releasing the edges of the sheet, and

means simultaneously operating said drawing means and said width-maintaining means,

18. In a sheet-glass drawing apparatus, the

combination; of sheetdrawlng' means, and sheet-stretching means intermittently seizing the edges of the sheet, with operating devices connected to said sheet-drawing'means and to said sheet-stretching means.

19. In a sheet-glass drawing apparatusfihe combination of sheet drawing means, and widt11-maintaining and sheet-stretching means intermittently seizing and releasing the edges of the sheet, with operating devices connected to said sheet-drawing means and to said width-maintaining and sheet-stretch-- ing means.

20. In a sheet-glass. drawing apjjaratus, the

combination of sheet-drawing means, with automatic width-maintaining means 'seizin the edges of the sheet at stated intervals, an devices imparting movement to said widthmaintaining means during said seizures.

. In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

' Witnesses: E. R. INMAN, 'GILsoN .SHAFFER.

IRVING w. COLBURN. 

